Australian filmmaker George Miller recently told a Sydney-based morning talk show that he is no longer affiliated with the long-rumored and supposedly in-production “Justice League” movie. The gears working for this latest attempt at an adaptation of DC Comic’s “Justice League” comic franchise have been moving since February of 2007, when Miller was initially attached to the project, and Warner Bros. had Kieran and Michele Mulroney attached to write a script. Miller himself would not confirm exactly why, but other sources have indicated that studio heads wanted the movie cast with more prominent big-name stars, as opposed to a popular trend in superhero comic movies these days that favors using…